What is the soil temperature in ZIP code 81121 today?

About 47°F on average in the top 4 inches (0–10 cm), low 42°F and high 54°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern). It is a model value for a grid cell 7.4 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 81121?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 13 and 55°F from Mar 20.

ZIP 81121 · Colorado · Nov 11, 2026

Soil temperature for ZIP code 81121

47°Faverage today, 0–4 in deep (modelled)
low 42°F · high 54°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 7.4 km from the ZIP centre point

On a week ago

1° warmer

46°F on Nov 4

5-day mean

47°F

what the verdicts use

Held 55°F last spring

Mar 20

crabgrass germination temperature

What the soil says today

Pre-emergentSeason over
Cool-season seedToo late in the season
Warm-season seedToo cold
TomatoesToo cold
Peas and lettuceWarm enough

From the 5-day mean of the modelled 0–4 in layer.

Soil temperature, 0–4 in: last 7 days and next 7

°F, modelled. Dots and line: daily average (dashed = forecast); bars: low to high; green band: 50–55°F.

View as table

Day	Average	Low	High
Nov 4	45.9°F	41.7°F	50.9°F	analysis
Nov 5	45.3°F	40.9°F	51.2°F	analysis
Nov 6	46.0°F	43.5°F	48.9°F	analysis
Nov 7	45.3°F	40.2°F	52.1°F	analysis
Nov 8	46.6°F	41.6°F	52.7°F	analysis
Nov 9	47.1°F	42.2°F	53.2°F	analysis
Nov 10	47.0°F	42.4°F	52.7°F	analysis
Today	47.3°F	42.5°F	53.6°F	analysis
Nov 12	47.3°F	42.4°F	53.2°F	forecast
Nov 13	46.3°F	42.2°F	51.0°F	forecast
Nov 14	45.4°F	42.6°F	48.0°F	forecast
Nov 15	44.6°F	40.7°F	50.2°F	forecast
Nov 16	45.2°F	40.8°F	51.0°F	forecast
Nov 17	45.5°F	40.8°F	51.7°F	forecast

Source: NOAA NCEP GFS 0.25°, 0–10 cm soil temperature, run Nov 11, 12:00 UTC (7 am Eastern).

Spring 2026 threshold dates

From the 5-day mean held for 10 days or more.

Soil	What it means	Held from (spring 2026)
40°F	Peas and lettuce	Feb 7
50°F	Pre-emergent window opens	Mar 13
55°F	Crabgrass can germinate	Mar 20
60°F	Tomatoes	May 11
65°F	Warm-season grass seed	May 28

Durango, CO, 50 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

81137 47°F · 87419 48°F · 81122 44°F · 81303 48°F · 81147 44°F · 87412 50°F · 87410 52°F · 87528 43°F

More: crabgrass timing in Colorado · every Colorado city · how accurate the model is.

Questions

What is the soil temperature in ZIP code 81121 today?: About 47°F on average in the top 4 inches (0–10 cm), low 42°F and high 54°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern). It is a model value for a grid cell 7.4 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 81121?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 13 and 55°F from Mar 20.

Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); 2025 Gazetteer ZIP Code Tabulation Areas (ZCTA) and 2024 cartographic boundary state outlines (U.S. Census Bureau).